The antonyms for the phrase "makes heavy" are plenty, and they describe actions that have the opposite effect of weighing something down. Examples include words such as lightens, relieves, alleviates, lifts, helps, and eases. These words imply actions that support a sense of lightness, release, or freedom. For instance, a massage or a deep breath can alleviate the tension and make you feel lighter. Similarly, a supportive friend or a kind gesture can help lift your mood and make your troubles feel less heavy. Embracing rituals that involve meditation, exercise, and relaxation can all help to ease stresses and provide a sense of calm.